| Z | 91 |
|---|---|
| Symbol | Pa |
| Name | Protactinium |
| Period | 7 |
| Atomic mass Scalar | 231.03588 |
| Density Scalar | 15370 |
| Melting point Scalar | 1873.15 |
| Boiling point Scalar | 4300 |
| Electronegativity Scalar | 1.5 |
| Abundance | <0.001 |
| Ionisation energy Scalar | 5.89 |
| Atomic radius Scalar | 180 |
| Electron configuration | [Rn] 5f2 6d1 7s2 |
| Top neighbor | Pr |
| Left neighbor | Th |
| Right Neighbor | U |
| German name | Protactinium |
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